/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.classfile.attribute.preverification;

/**
 * This class provides methods to create and reuse IntegerType objects.
 *
 * @author Eric Lafortune
 */
public class VerificationTypeFactory {
    // Shared copies of Type objects, to avoid creating a lot of objects.
    static final IntegerType INTEGER_TYPE = new IntegerType();
    static final LongType LONG_TYPE = new LongType();
    static final FloatType FLOAT_TYPE = new FloatType();
    static final DoubleType DOUBLE_TYPE = new DoubleType();
    static final TopType TOP_TYPE = new TopType();
    static final NullType NULL_TYPE = new NullType();
    static final UninitializedThisType UNINITIALIZED_THIS_TYPE = new UninitializedThisType();

    /**
     * Creates a new IntegerType.
     */
    public static IntegerType createIntegerType() {
        return INTEGER_TYPE;
    }

    /**
     * Creates a new LongType.
     */
    public static LongType createLongType() {
        return LONG_TYPE;
    }

    /**
     * Creates a new FloatType.
     */
    public static FloatType createFloatType() {
        return FLOAT_TYPE;
    }

    /**
     * Creates a new DoubleType.
     */
    public static DoubleType createDoubleType() {
        return DOUBLE_TYPE;
    }

    /**
     * Creates a new TopType.
     */
    public static TopType createTopType() {
        return TOP_TYPE;
    }

    /**
     * Creates a new NullType.
     */
    public static NullType createNullType() {
        return NULL_TYPE;
    }

    /**
     * Creates a new UninitializedThisType.
     */
    public static UninitializedThisType createUninitializedThisType() {
        return UNINITIALIZED_THIS_TYPE;
    }

    /**
     * Creates a new UninitializedType for an instance that was created at the given offset.
     */
    public static UninitializedType createUninitializedType(int newInstructionOffset) {
        return new UninitializedType(newInstructionOffset);
    }

    /**
     * Creates a new ObjectType of the given type.
     */
    public static ObjectType createObjectType(int classIndex) {
        return new ObjectType(classIndex);
    }
}
